Panel-board installation



May 5, 1925.

W. A. STACEY PANEL BOARD INSTALLATION Filed May 25 1922 w w S ATTURNEYS Patented May 5, 1925.

' l1Nli"l-"l'fflDv ...STATES- PATENT ortieswratten rtg-saisons., or cHIcAGo, LLINoIs, AssroNon. To THE BRYANT ELECTRIC i COMANVY, F :BRIDGEPOB-T, CONNECTICUT, A CORPORATION OF COITNECTICUT.

'PANELBOARD INSTALLATION, l

A'ppneatioii'mee ra'y a5, 1922. serial No. 563,652.

To allwhom it 'may concern:

Be it lruown that I, WELIAM A..STAC 1-:Y,

a citizen of the United State s' 'AJnerica, residing at Chicago, in the county'of Cook 6 and b'tate of Illinois, have invented certain new and useful Improvements 1n Panel- Board Installations,;of which the following isa specification. l

My vinvention relates to panellboard instal- 0 lations, and'particularly to an' installation built up f from' a' 'plurality y 'of' "panel-board units, together with nisulavtingcovers' ordingwhat' i's commonly known dead front-2 paneLrThelbbiepvqf.my man@ isl 'to'p'rovide civer'"ineansfjfgr'anfjinstallation of'tliis type, byfvvhich 'it'r'nay fbe adapted to panel-board, boxes "of"v.'a'r1ols j lengtlis,

The'installatibnilillustirsited is of the fi'ush casing type, comprisinga box body 57 the margins of which are set substantla-lly flush with the wall 6, and provided with an outwardly openingv hinged door 7. Secured to the bottom of the'box is a series of branch cut-outs 8, 9 and 10, of standard type, trans versely grooved to receive the mains 11 which enter the box at one end through the bushing 12 andemerge at the opposite end bushing 13. Branch connections are established'through Wire terminals 14. of usual type, protective Jr'uses lbeing interposed in the branch connections as customary.

It will be notedthat the cut-out units, of which only three, 8, 9 and 10 are here shown, do not completely lill the box 5, and that the mains 11 extend beyond the ends of the installation. It has been customary heretofore r to provide such units withA protective covers of the type illustrated at 16 for the unit S), which are substantially co-extensive with the insulating bases of' the cut-out blocks with which they are associated. Obviously, if the end cut-out units 8 and 10 were provided with covers of similar character, the wire mains 11 at the ends of the installation would he exposed and constitute a possible source of danger. To avoid this I provide lll.)

while still insuring rf covers of special shape for these end 8 and 10 of the installation.

As here shown, these special covers comprise extensions 1T which overhang the blocks 8 and 10 and partially over-lie the exposed mains l1 between these blocks and the opposite ends of the bor; lVhile thestI over-hangs may atl'ord sufficient protection for boxes of certain dimensions, there is such variation in the dimensions ot' standard boxes manufactured by various makers that a fixed overhang will not take care of all conditions. I therefore provide an additional shutteri18 mounted on the overhang 17 and adapted for extension beyond the edge of the overhang to substantially completely ovcrlie the exposed mains l1 anr'; thus prevent accidental access thereto by the attendant.V Any suitable means may be prounits vided forlsecuring the shuttersto. the covers; j For exampleLthey may be slotted at 19 to receive the shanksA of clz'nnpino screws 2O whiclitalre into tapped, holes in tie overhang 17 ofeach'cover. A

prises a protective metal frontv lined with insulation 21, which projects beyond the outer edge of the shutter. 'Should the latter be extended outward sutliciently to engage the end wall ot' the box 5, the insulatinglining engages the latter and there is consequently no danger of current reaching the metal plate of the cover should the box 5 be charged with current through defective insulation of the wires.

The end covers 22 and 23 are secured to their respective cut-out blocks 8 and 10 by the usual clamping screws 24 -in the same fashion as that commonly employed for securing the standard covers 16 in position. There is no necessity for alteration-of the blocks 8 and 10 to ermit the use of these special end covers. n order. that these covers 22 and 23 may properly cooperate with .the standard cover 16 of the block 9, the cover 22 is provided at one e'dge with a raised lip 25 which makes a lap joint with one edge of the cover 16. The cover 23, on the other hand, is lapped by the lip 25 of the standard cover 16, and inasmuch as the cut-out block 10 forms one endY of the installation, the extension edge of the cover 23 is continued in the same plane as the body thereof.

in :i

,The construction shown may be varied in many ways without departing from my invention, my object being to provide a 'unit panel-board installation with :i protective cover, the ends ofwhich are adjustable to accommodate the cover to the varying dimensions of standard cut-out boxes. possible to provide a cover common to the group of branch cut-outs rather than. to utilize a separate cover for each unit, and in such 'case the cover at one or bothends would be provided nii-tlf an' adjustable eX- tension shutter for the purpose set forth.

It isobvious that various' other modifications i'n details of structure' :rziy be pro-f vided? without departing jY from claim :is my'inventioii.

I clnim- 1'. In a multi-unit units .mounted Within' the czis in'g, a- L )itotet'zf' tive cover for each nnit,":1i 1 fe te iisio1if 01; the cover ofthe en'd'lunit, and 'iens ably securing said extension, to seid"'cover'z plane substantially 'parallel v'vitllfthe latter and -in extension' thereofl to oi-erlie conductors-extending beyond the end of tlie installation.

2. A panel-board installation comprising n casi'ng'e. plurality of uxtposed'cutrout units mounted within the. ca singprotecti.je

cover means overlying said.'v iinits and se.

cured thereto, together Witlyanl ndjustable extension for the' cover of theend unit to prevent access to conductors leading to the end of the installation,

It isA 3. A panel-board installation comprising arousing, a plurality of 'lixtaposed 4cnt-out units mounted iv'ithir". casing', 'firotective cover means overlying said unit-s v:sind Secured "thereto, "-toofether` with an adjust- 4:. A cover for, a. :mel-board.,unitz of-the ,type described, cover-.being .substantially coincidentnt one mal-0in withthe side of the ttingxvhich `t overies, but project substantiallyf lbeyond fthe. op osito side E Qfthe'ttilgfe siverlieihe-.eo lewis es: 'E 'tending beyond the.letter,A together with -an a-d1ustable shutter associtedywitlrsaidpro prising. af metal `cover 'latte AIrojecting. be- 

